<script setup lang="ts">

import { computed, ref, watch } from 'vue';

// 定义水果对象的类型
interface Fruit {
  id: number
  icon: string
  isChecked: boolean
  num: number
  price: number
}
// 水果列表
const redfruitList = ref<Fruit[]>([
  {
    id: 1,
    icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/ll.png',
    isChecked: true,
    num: 2,
    price: 6,
  },
  {
    id: 2,
    icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/smt.png',
    isChecked: false,
    num: 7,
    price: 20,
  },
  {
    id: 3,
    icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/tg.png',
    isChecked: false,
    num: 3,
    price: 40,
  },
  {
    id: 4,
    icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/xg.png',
    isChecked: false,
    num: 10,
    price: 3,
  },
  {
    id: 5,
    icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/yl.png',
    isChecked: false,
    num: 20,
    price: 34,
  },
],)

//持久化存储
const fruitList = localStorage.getItem('list')===null
?ref<Fruit[]>(redfruitList.value)
:ref<Fruit[]>(JSON.parse(localStorage.getItem('list')||'null') )

watch(fruitList,()=>{
  localStorage.setItem('list',JSON.stringify(fruitList.value))
},{deep:true})

//减减按钮
const minish = (index: number) => {
  if (fruitList.value[index].num > 1) {
    fruitList.value[index].num--
  }
}
//删除某个商品
const delFriut = (id: number) => {
  fruitList.value = fruitList.value.filter((item) => {
    return item.id != id
  })
  
}
//全选操作
const allFoods = computed({
    get() {
     return fruitList.value.every((item) => {
        return item.isChecked
      })
    },
    set(value: boolean) {
     
      fruitList.value.forEach(item => item.isChecked = value)
    }
  })
</script>

<template>
  <div class="app-container" id="app">
    <!-- 顶部banner -->
    <div class="banner-box"><img src="https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/sg_top.png" alt="" /></div>
    <!-- 面包屑 -->
    <div class="breadcrumb">
      <span>🏠</span>
      /
      <span>购物车</span>
    </div>
    <!-- 购物车主体 -->
    <div class="main" v-if="fruitList.length != 0">
      <div class="table">
        <!-- 头部 -->
        <div class="thead">
          <div class="tr">
            <div class="th">选中</div>
            <div class="th th-pic">图片</div>
            <div class="th">单价</div>
            <div class="th num-th">个数</div>
            <div class="th">小计</div>
            <div class="th">操作</div>
          </div>
        </div>
        <!-- 身体 -->
        <div class="tbody">
          <div class="tr active" v-for="(item, index) in fruitList" :key="item.id">
            <div class="td"><input type="checkbox"  v-model="item.isChecked" /></div>
            <div class="td"><img :src="item.icon" alt="" /></div>
            <div class="td">{{ item.price }}</div>
            <div class="td">
              <div class="my-input-number">
                <button class="decrease" @click="minish(index)"> - </button>
                <span class="my-input__inner">{{ item.num }}</span>
                <button class="increase" @click="item.num++"> + </button>
              </div>
            </div>
            <div class="td">{{ item.price * item.num }}</div>
            <div class="td" @click="delFriut(item.id)"><button>删除</button></div>
          </div>
          <!-- <div class="tr">
            <div class="td"><input type="checkbox" /></div>
            <div class="td"><img src="https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/smt.png" alt="" /></div>
            <div class="td">7</div>
            <div class="td">
              <div class="my-input-number">
                <button disabled class="decrease"> - </button>
                <span class="my-input__inner">1</span>
                <button class="increase"> + </button>
              </div>
            </div>
            <div class="td">14</div>
            <div class="td"><button>删除</button></div>
          </div> -->
        </div>
      </div>
      <!-- 底部 -->
      <div class="bottom">
        <!-- 全选 -->
        <label class="check-all">
          <input type="checkbox" v-model="allFoods" >
          全选
        </label>
        <div class="right-box">
          <!-- 所有商品总价 -->
          <span class="price-box">总价&nbsp;&nbsp;:&nbsp;&nbsp;¥&nbsp;<span class="price">{{ fruitList.reduce((ad, v) => {
          return  v.isChecked? ad + v.price * v.num:ad
          }, 0) }}</span></span>
          <!-- 结算按钮 -->
          <button class="pay">结算{{ fruitList.reduce((dd, e) => {
            return  e.isChecked? dd + e.num:dd
          }, 0) }}</button>
        </div>
      </div>
    </div>
    <!-- 空车 -->
    <div class="empty" v-else>🛒空空如也</div>
  </div>
</template>

<style scoped>
@import './style/inputnumber.css';
@import './style/index.css';
</style>